CN212844818U - Waste hydrochloric acid concentration detection device of pickling line - Google Patents
Waste hydrochloric acid concentration detection device of pickling line Download PDFInfo
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- CN212844818U CN212844818U CN202021138125.8U CN202021138125U CN212844818U CN 212844818 U CN212844818 U CN 212844818U CN 202021138125 U CN202021138125 U CN 202021138125U CN 212844818 U CN212844818 U CN 212844818U
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Abstract
The utility model relates to a waste hydrochloric acid concentration detection device of a pickling line, which comprises a reaction cylinder, an inner baffle and a mixing cylinder which are assembled and connected; the inner baffle plate comprises a medicine storage groove, a flow guide hole with a through thickness is formed in the inner baffle plate, and the inner baffle plate is arranged between the reaction cylinder and the mixing cylinder. The method for detecting the concentration of the waste hydrochloric acid by adopting the device is designed based on the reaction principle of hydrochloric acid and carbonate, and the mass difference before and after the reaction is detected by the detection and measurement device△mObtaining actual gas CO2Measuring, namely obtaining the consumption of hydrochloric acid in the acid solution to be measured according to the mass conservation law, and calculating the concentration coefficient A value by combining the volume Va of the acid solution to be measured, thereby obtaining the concentration coefficient A value by calculationThe concentration of free acid in the acid sample is measured. The utility model discloses can realize the short-term test of spent acid concentration, avoid the big problem of data deviation again.
Description
Technical Field
The utility model relates to a belted steel pickle concentration detection area especially relates to a pickling line waste hydrochloric acid concentration detection device.
Background
The hydrochloric acid is an important chemical medium in the pickling process, has high pickling efficiency and little corrosion to a substrate, and is suitable for large-scale continuous pickling operation. The acid liquor concentration in the production is directly related to the pickling speed and the pickling time, and the effective monitoring of the acid liquor concentration is an important condition for ensuring the pickling quality of the strip steel.
The acid liquor concentration detection method commonly used in the laboratory comprises a titration method and a specific gravity method. The titration method adopts an acid-base neutralization principle, and determines the concentration value of the acid liquor by observing the color change of the solution. A large amount of Fe2+, Fe3+ and other impurities exist in waste acid, so that the judgment of titration conversion is seriously disturbed, and measurement errors are caused. The hydrometric method determines a concentration value by comparing density-concentration data of acid liquor to be detected at room temperature, is suitable for measuring new acid, and cannot meet the detection requirement of waste acid concentration. The online hydrochloric acid concentration detection in industrial production is obtained by calculation through a mathematical model, the model is based on numerical analysis of indexes such as acid liquor temperature, density and conductivity, deviation exists in a calculation result, and the deviation needs to be corrected by means of experimental data.
The prior published data on the detection of the concentration of the waste hydrochloric acid is not abundant, and Chinese patent application with publication number CN109306495A discloses an automatic control method for the concentration of hydrochloric acid in a pickling line, which is used for realizing the process balance of the hydrochloric acid in the pickling line, keeping the concentration of the acid in each process section within a specific range and does not relate to how to detect the concentration index of the waste acid. Chinese patent No. CN203264534U discloses "a hydrochloric acid concentration control device" for controlling the concentration of hydrochloric acid, which is a byproduct of hydrogen chloride tail gas absorption production, and qualitatively indicates the concentration by controlling the position of a floating ball, and does not relate to quantitative detection of acid liquor concentration; chinese patent No. CN207336417U discloses an "acid solution concentration online detection system" for detecting the concentrations of a plurality of acid tanks, which calculates the acid solution concentration by the rearrangement of data acquisition components and the construction of an artificial network model, and obtains a result that is a model calculation value, not experimental measurement data.
Therefore, the existing detection method or detection system is respectively suitable for different fields, and the detection mode and detection precision of the detection method or detection system cannot well meet the requirement of quantitative detection on the concentration of waste acid in production.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a pickling line waste hydrochloric acid concentration detection device is provided, utilize the device can realize the short-term test of spent acid concentration, avoided the big problem of data deviation again.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a waste hydrochloric acid concentration detection device of a pickling line comprises a reaction cylinder, an inner partition plate and a mixing cylinder which are assembled and connected; the inner baffle comprises a medicine storage groove, a flow guide hole with a through thickness is formed in the inner baffle, and the inner baffle is arranged between the reaction cylinder and the mixing cylinder.
Foretell pickling line waste hydrochloric acid concentration detection device, the butt joint is matchd with compounding canula portion downwards to reaction cylinder mouth portion, and the inner baffle is located between reaction cylinder and the compounding canula portion, and the inner baffle middle part is equipped with to the sunken medicine storage tank of compounding section of thick bamboo one side, and medicine storage tank circumference is opened has a plurality of water conservancy diversion holes that link up inner baffle thickness.
The waste hydrochloric acid concentration detection device for the pickling line is characterized in that the mixing cylinder is the same as the reaction cylinder in diameter, the side wall of the mixing cylinder is connected with the exhaust pipe, and the exhaust pipe is provided with the exhaust valve.
Adopt the utility model discloses carry out waste hydrochloric acid concentration detection's method, including following step:
the first step is as follows: weighing the total mass m1 of the reaction cylinder, the inner partition plate and the mixing cylinder;
the second step is that: placing a mixing cylinder on a balance, deducting the tare weight, measuring Va ml of acid liquor to be measured, placing the acid liquor into the mixing cylinder, and recording the mass m2 of the acid liquor to be measured; measuring Vw ml of desalted water, and dripping the desalted water into a mixing cylinder at the speed of 100-600 ml/min; va is less than or equal to 5 ml, Vw/Va is less than or equal to 5 and less than or equal to 10;
the third step: placing the inner baffle on a mixing barrel, deducting tare weight, and adding CaCO with mass less than or equal to 3.0g3Placing the analytical reagent into a reagent storage tank, recording the mass m3 of the analytical reagent, and butting the reaction cylinder with the mouth part of the mixing cylinder;
the fourth step: inverting the detection device, allowing the acid solution to be detected to flow into the reaction cylinder through the diversion holes, allowing the analytically pure acid solution to fall into the acid solution to be detected from the medicine storage tank, opening the exhaust valve, and discharging the reaction gas through the exhaust pipe;
the fifth step: after the reaction is finished, weighing the total mass m4 of the detection device and the reaction solution;
and a sixth step: and (3) calculating to obtain the free acid concentration of the acid sample to be detected: and substituting the data measured in the first step to the fifth step into the following calculation formula to obtain the free acid concentration of the acid sample to be measured:
C HCl = A×△m g/L
in the formula:C HCl -the concentration of free acid in the acid sample to be tested;
△m=(m1+m2+m3)-m4(g)；
a is concentration coefficient, and the value A = (2000 xM)HCl)/(Va×MCO2) (1/L)，MHCl、MCO2Respectively as HCl and CO2Relative molecular weight of (a).
The reaction cylinder of the utility model is positioned at the upper part of the whole detection device and is the part for designing the reaction; the inner baffle is positioned between the reaction cylinder and the mixing cylinder, the inner baffle is provided with a medicine storage groove and a flow guide hole, and the medicine storage groove is concave to one side of the mixing cylinder and is used for storing and weighing medicines; the guide holes are communicated with the reaction cylinder and the mixing cylinder, and acid liquor to be detected in the mixing cylinder can flow into the reaction cylinder through the guide holes distributed in the circumferential direction of the medicine storage groove and react with the medicine; the mixing cylinder is positioned at the lower part of the whole detection device, and the upper opening of the mixing cylinder is in contact with the inner partition plate and the reaction cylinder and is used for containing a mixed solution of acid liquor to be detected or desalted water and the acid liquor to be detected. The side wall of the mixing cylinder is connected with an exhaust pipe, so that gas generated in the reaction process can be exhausted.
Adopt the utility model discloses the method of carrying out waste hydrochloric acid concentration detection designs based on hydrochloric acid and carbonate reaction principle. The quality difference before and after reaction is detected by a measuring device△mObtaining actual gas CO2And (3) measuring, namely obtaining the consumption of hydrochloric acid in the acid solution to be measured according to a mass conservation law, and calculating a concentration coefficient A value by combining the volume Va of the acid solution to be measured, so as to calculate the free acid concentration of the acid sample to be measured.
The waste acid contains a large amount of metal ions and other impurities, which affects the measurement result of the existing physical and chemical detection method. The reaction process of the carbonate and the free acid is not interfered by impurities, the reaction process is controllable, and the generated gas can be accurately measured, so that the acid liquid detection device and the detection method designed based on the principle can well meet the requirement of acid liquid concentration detection in a laboratory.
CaCO in actual production3The reagent has wide application, low cost and convenient storage, can be used as an optimal analytical medicine, can complete acid liquor detection within the range of less than or equal to 280 g/L by using 2.0 g, and meets the requirement of acid pickling production. The volume ratio of the desalted water to the acid solution to be detected is preferably not less than 5 and not more than 10, and if the ratio is too small, the reaction is slow, so that the detection efficiency is influenced; too large a proportion can easily result in splashing of the solution, affecting the weighing result. The cup body can be slightly shaken along the circumferential direction after the measuring device is inverted, so that the medicament is ensured to be fully contacted with the solution. And recording data after the balance reading is stable when no bubble is gathered on the wall and the liquid level of the cup.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model solves the problem of large concentration deviation of waste acid detected in the existing laboratory, and the deviation of the waste acid solution concentration and the standard sample measured by the utility model is within 1.5 percent after experimental verification; the device of the utility model can realize the accurate measurement of the concentration of the regenerated fresh acid and the waste acid;
(2) the utility model discloses simple structure, simple operation, low cost satisfy production line acidizing fluid inspection demand.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of an inner baffle;
FIG. 3 is a schematic view of a mixing bowl;
the figures are labeled as follows: reaction cylinder 1, inner baffle 2, mixing cylinder 3, medicine storage tank 4, water conservancy diversion hole 5, discharge valve 6, blast pipe 7, circular recess 8.
Detailed Description
Fig. 1 shows that the waste hydrochloric acid concentration detection device of the pickling line of the present invention comprises a cylindrical reaction cylinder 1, a circular inner partition plate 2 and a cylindrical mixing cylinder 3, wherein the diameters of the reaction cylinder 1 and the mixing cylinder 3 are the same, the mouth of the reaction cylinder 1 faces downward, and the mouth of the mixing cylinder 3 faces upward; a circular groove 8 with the diameter matched with that of the inner baffle 2 is formed in the opening part of the mixing cylinder 3 towards the bottom, the inner baffle 2 is placed in the circular groove 8, and the depth of the circular groove 8 is larger than the thickness of the inner baffle 2;
FIGS. 1 and 3 show that an exhaust pipe 7 is connected with an opening on the side wall of the mixing cylinder 3, and an exhaust valve 6 is arranged on the exhaust pipe 7;
fig. 1 shows that a circular medicine storage groove 4 which is recessed downwards is designed in the middle of an inner partition plate 2, fig. 2 shows that a plurality of flow guide holes 5 are equidistantly arranged in the circumferential direction of the medicine storage groove 4, the circle centers of the plurality of flow guide holes 5 are connected to form a circle which is concentric with the inner partition plate 2, and the sizes of the plurality of flow guide holes 5 are the same;
FIG. 1 shows that the inner baffle 2 is placed in a circular groove 8 of a mixing barrel 3, and a medicine storage groove 4 is sunken towards the bottom of the mixing barrel 3;
FIG. 1 shows that the reaction cylinder 1 is composed of an upper half part and a lower half part, the outer diameter of the upper half part is the same as that of the mixing cylinder 3, the outer diameter of the lower half part is matched with that of the circular groove 8 of the mixing cylinder 3, and the height of the lower half part is equal to the difference between the depth of the circular groove 8 of the mixing cylinder 3 and the thickness of the inner partition plate 2;
adopt the utility model discloses a device to carry out waste hydrochloric acid concentration detection, need to use medicine, utensil to include: CaCO3 is analyzed to be pure, desalted water and acid liquor to be detected; the detection implementation steps are as follows:
the first step is as follows: weighing the total mass m1 of the reaction cylinder 1, the inner partition plate 2 and the mixing cylinder 3;
the second step is that: placing the mixing cylinder 3 on a balance, deducting the tare weight, measuring Va ml of acid liquor to be measured, placing the acid liquor into the mixing cylinder 3, and recording the mass m2 of the acid liquor to be measured; measuring Vw ml of desalted water, and dripping the desalted water into the mixing cylinder 3 at the speed of 100-600 ml/min; va is less than or equal to 5 ml, Vw/Va is less than or equal to 5 and less than or equal to 10;
the third step: the inner baffle 2 is placed in the circular groove 8 of the mixing drum 3, and CaCO with the weight less than or equal to 3.0g is measured after the tare weight is deducted3Placing the analytically pure into the medicine storage tank 4, recording the mass m3 of the analytically pure, and combining the reaction cylinder 1 with the mouth of the mixing cylinder 3;
the fourth step: inverting the detection device, allowing the acid solution to be detected to flow into the reaction cylinder 1 through the diversion holes 5, allowing the analytically pure acid solution to fall into the acid solution to be detected from the medicine storage tank 4, opening the exhaust valve 6, and discharging the reaction gas through the exhaust pipe 7;
the fifth step: after the reaction is finished, weighing the total mass m4 of the reaction cylinder 1, the inner partition plate 2, the mixing cylinder 3 and the solution after the reaction;
and a sixth step: calculating to obtain the concentration of the waste acid liquid: and substituting the data measured in the first step to the fifth step into the following calculation formula to obtain the free acid concentration of the acid sample to be measured:
C HCl = A×△m g/L
in the formula:C HCl -the concentration of free acid in the acid sample to be tested;
△m=(m1+m2+m3)-m4(g)；
a is concentration coefficient, and the value A = (2000 xM)HCl)/(Va×MCO2) (1/L)，MHCl、MCO2Respectively as HCl and CO2Relative molecular weight of (a).
The comparison and verification of the acid solution concentration measured by the device and the existing method are shown in table 1.
TABLE 1 comparison of the different test methods
Can know by measured data, adopt the utility model discloses the waste acid liquid concentration test result that the device obtained is stable, within 1.5% with the standard sample deviation.
Claims (3)
1. The utility model provides a pickling line waste hydrochloric acid concentration detection device which characterized in that: comprises a reaction cylinder (1), an inner baffle (2) and a mixing cylinder (3) which are assembled and connected; the inner baffle (2) comprises a medicine storage groove (4), a flow guide hole (5) with a through thickness is formed in the inner baffle (2), and the inner baffle (2) is arranged between the reaction cylinder (1) and the material mixing cylinder (3).
2. The pickling line waste hydrochloric acid concentration detection apparatus of claim 1, wherein: the reaction cylinder (1) is connected with the mixing cylinder (3) in a butt joint mode in a downward matching mode at the opening, the inner partition plate (2) is located between the reaction cylinder (1) and the mixing cylinder (3), the middle of the inner partition plate (2) is provided with a medicine storage groove (4) which is sunken towards one side of the mixing cylinder (3), and a plurality of flow guide holes (5) penetrating through the thickness of the inner partition plate (2) are formed in the circumferential direction of the medicine storage groove (4).
3. The pickling line waste hydrochloric acid concentration detection apparatus according to claim 1 or 2, characterized in that: the mixing cylinder (3) is the same as the reaction cylinder (1) in diameter, the side wall of the mixing cylinder (3) is connected with an exhaust pipe (7), and an exhaust valve (6) is installed on the exhaust pipe (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021138125.8U CN212844818U (en) | 2020-06-18 | 2020-06-18 | Waste hydrochloric acid concentration detection device of pickling line |
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| CN202021138125.8U CN212844818U (en) | 2020-06-18 | 2020-06-18 | Waste hydrochloric acid concentration detection device of pickling line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111781081A (en) * | 2020-06-18 | 2020-10-16 | 邯郸钢铁集团有限责任公司 | Pickling line waste hydrochloric acid concentration detection device and method |
| CN113758828A (en) * | 2021-08-26 | 2021-12-07 | 华能国际电力股份有限公司上海石洞口第一电厂 | Rapid detection method for concentration of industrial hydrochloric acid |
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2020
- 2020-06-18 CN CN202021138125.8U patent/CN212844818U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111781081A (en) * | 2020-06-18 | 2020-10-16 | 邯郸钢铁集团有限责任公司 | Pickling line waste hydrochloric acid concentration detection device and method |
| CN113758828A (en) * | 2021-08-26 | 2021-12-07 | 华能国际电力股份有限公司上海石洞口第一电厂 | Rapid detection method for concentration of industrial hydrochloric acid |
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